Analog Devices Inc./Maxim Integrated MAX335EUG+

Overview

The MAX335EUG+ from Maxim Integrated is a serial-controlled, 8-channel SPST analog switch IC designed for high-voltage signal routing in industrial and avionics systems. It features ±4.5V to ±20V dual-supply operation, 100Ω typical on-resistance, SPI-compatible 3-wire interface, and -40°C to +85°C extended temperature range. It enables daisy-chained configuration for multi-device control in data acquisition and process control applications.

For engineers reviewing the MAX335EUG+ datasheet, MAX335EUG+ pinout, MAX335EUG+ application, or MAX335EUG+ equivalent, key selection considerations include rail-to-rail analog swing support (±15V), 24-pin TSSOP package compatibility, break-before-make timing (15–25ns), and VL-referenced logic reset functionality.

Technical Context

The MAX335EUG+ implements an 8-bit shift register architecture synchronized to SCLK's rising edge, with CS-controlled latch update on its rising edge (only when SCLK is low). Its internal translator circuitry supports TTL- and CMOS-level digital inputs via VL supply (4.5V to V+), enabling flexible microcontroller interfacing.

Each of the eight SPST switches operates bidirectionally with matched on-resistance across the full analog range (-15V to +15V), and exhibits low charge injection (<70pC) and off-isolation >90dB at 100kHz. The device integrates digital feedthrough suppression via 100mV SCLK hysteresis and guarantees monotonic switching behavior under all valid supply conditions.

Key Specifications

Pinout & Package

The MAX335EUG+ is housed in a 24-pin TSSOP package (4.4mm × 7.8mm, 0.65mm pitch), optimized for high-density PCB layouts and thermal performance up to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with MAX335EUG+, MAX336EUG+ scales channel count at the cost of serial frame length and slightly degraded RON, while ADG1408BRUZ trades serial simplicity for superior analog performance and reduced pin count-but demands dedicated address/control lines.

Availability

MAX335EUG+ is available at Aetrix Electronics and suitable for avionics signal routing, industrial process control, and serial data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX335EUG+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on robustness and integration.

The MAX335EUG+ belongs to Maxim's precision analog switch product line, engineered specifically for high-voltage, serially controlled signal routing in safety-critical and mission-critical systems.

FAQ

What is the maximum analog signal voltage the MAX335EUG+ can handle?

The MAX335EUG+ supports analog signals from -15V to +15V relative to V−, with guaranteed operation across its full ±4.5V to ±20V dual-supply range. This rail-to-rail capability allows direct interfacing with ±12V op-amps and industrial sensor outputs without external level-shifting circuitry. The device maintains constant 100Ω on-resistance across this entire analog range, ensuring predictable signal transfer characteristics.

Does the MAX335EUG+ support daisy-chaining, and how is it implemented?

Yes, the MAX335EUG+ supports daisy-chaining via its DOUT pin, which outputs the serial data stream delayed by eight clock cycles. To chain multiple devices, connect DOUT of one MAX335EUG+ to DIN of the next, with all SCLK and CS lines tied in parallel. When CS rises, all devices simultaneously update their switch states from the respective 8-bit segments of the shifted data stream-enabling scalable channel expansion using only three MCU pins.

What is the function of the VL pin on the MAX335EUG+, and how does it affect operation?

The VL pin on the MAX335EUG+ serves two functions: it sets the logic input threshold (1.6V typical) and enables hardware reset. When VL is pulsed below 0.8V, the internal shift register clears to zero and all eight switches force OFF-providing deterministic initialization. VL must be supplied between 4.5V and V+; if tied to V+, the reset function is disabled, and logic thresholds scale with supply voltage, limiting TTL compatibility.

How does the MAX335EUG+ ensure signal integrity during switching transitions?

The MAX335EUG+ ensures signal integrity through multiple design features: break-before-make timing (15–25ns) prevents momentary shorts between channels; low off-capacitance (2pF) and high off-isolation (>90dB) minimize crosstalk; and charge injection is limited to <70pC across the analog range. These parameters-verified over -40°C to +85°C-maintain sub-0.01% distortion in precision measurement paths, even during rapid multiplexing sequences.

Is the MAX335EUG+ pin-compatible with other variants in the MAX335 family?

Yes, the MAX335EUG+ shares identical pinout and footprint with all 24-pin MAX335 variants-including MAX335ENG (DIP), MAX335EWG (SO), and MAX335CNG-enabling drop-in replacement across temperature grades and packages. All variants use the same electrical interface, timing specifications, and functional behavior; only operating temperature range (-40°C to +85°C for E-grade) and package type (TSSOP) differ for the MAX335EUG+.